Haemolymph acid‐base status of the stalked barnacleCalantica spinosa

Abstract

Haemolymph pH and P co2 were determined for the pedunculate intertidal barnacle Calantica spinosa (Quoy & Gaimard) during submersion and aerial exposure at 15°C. The increase in haemolymph P co2 (4.1 to 7.1 mm Hg) and concomitant decrease in haemolymph pH (7.36 to 7.22) described for C. spinosa during exposure in air are characteristic for aquatic invertebrates during shortterm emersion. In vivo haemolymph pH during submergence was determined for barnacles acclimated to a range of temperatures between 5 and 25°C. The pH of Calantica haemolymph is maintained at a constant relative alkalinity of ~0.2 pH units. In vivo haemolymph pH varies with temperature (T, °C) according to the relationship pH/ T = -0.0192 pH units °C -1 .

Supplementary oxygen and temperature management during live transportation of greenlip abalone,Haliotis laevigata(Donovan, 1808)

“…A decrease in haemolymph pH is characteristic of emersed aquatic invertebrates (Innes 1986) including abalone (Ragg 2003). Haemolymph pH was lower in all live‐transport treatments relative to the control specimens, but this reduction was most pronounced in treatments without ice and supplementary oxygen (Fig.…”

Meta‐analysis suggests negative, but pCO2‐specific, effects of ocean acidification on the structural and functional properties of crustacean biomaterials

“…Our current understanding of the physiological responses of marine crustaceans to acidification can be traced to studies of acid‐base regulation under hypercapnic (high CO 2 ) conditions. In the latter half of the 20th century, relevant publications focused on crustacean physiological responses following exposure to hypercapnic/hypoxic conditions induced by aerial exposure and, subsequently, hemolymph acidosis (Innes, 1986 ; Taylor & Whiteley, 1989 ; Tylor‐Jones & Taylor, 1988 ). Tyler‐Jones and Taylor ( 1988 ) reported efficient pH compensation in hemolymph of the crayfish Austropotamobius pallipes following aerial exposure: pH and lactate levels returned to submerged values within 24 h, with noted increases in .…”